CN101130978A - Compacted bearing disk machine hydraulic unit - Google Patents
Compacted bearing disk machine hydraulic unit Download PDFInfo
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- CN101130978A CN101130978A CNA2007101196391A CN200710119639A CN101130978A CN 101130978 A CN101130978 A CN 101130978A CN A2007101196391 A CNA2007101196391 A CN A2007101196391A CN 200710119639 A CN200710119639 A CN 200710119639A CN 101130978 A CN101130978 A CN 101130978A
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- fuel tank
- bearing disk
- disk machine
- hydraulic unit
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Abstract
The present invention discloses one kind of branch disc extruding and expanding machine hydraulic pressure station, which includes one oil tank, one motor driven oil pump, one liquid level gauge and one change-over valve. The hydraulic pressure station is divided into two parts, including the first part with oil tank and the second part with motor driven oil pump. The hydraulic pressure station has also one air cooler for cooling hydraulic oil and set in the first part or the second part. The liquid level gauge is communicated to the oil tank, the oil pump has inlet communicated through pipeline to the oil tank and outlet communicated through pipeline to the change-over valve, and the oil returning port of the change-over valve is communicated through a oil returning pipeline to the oil tank. The hydraulic pressure station has effectively lowered hydraulic oil temperature, and the branch disc extruding and expanding machine has raised operation efficiency.
Description
Technical field
The present invention relates to a kind of Hydraulic Station, particularly the compacted bearing disk machine hydraulic unit that can reduce the oil temperature of building trade.
Background technology
Extruding-enlarging branch tray machine is the visual plant that modern ground is handled, and is used for behind the vertical hole that forms ground, the hole wall soil body is carried out squeezed, to form disk-shaped slots.Thisly be used for the squeezed enough power drives of extruding-enlarging branch tray machine needs of datum hole wall over the ground, therefore this extruding-enlarging branch tray machine adopts hydraulic-driven usually, in the piston, mechanical energy is converted into heat energy in hydraulic-driven extruding-enlarging branch tray Oil cylinder, makes the hydraulic oil of carrying out the hydraulic pressure operation be heated.When hydraulic oil was heated to a certain degree, the what is called phenomenon of " boiling " will appear in the hydraulic oil in the fuel tank of compacted bearing disk machine hydraulic unit, and cisco unity malfunction.Solve the technical measures of described " boiling " phenomenon at present, the one, water circulation cooling, the 2nd, ice cube cooling, the 3rd, cooling naturally.The cost of above-mentioned first and second measures is higher, and is unsuitable for adopting in the lack of water environment.In fact the 3rd measure is exactly to stop work, and waits for after hydraulic oil temperature drops to normal value and operating that this reduces squeezed operating efficiency again greatly.
China uses novel patent ZL200420053210.9 to disclose a kind of a kind of compacted bearing disk machine hydraulic unit relevant with the present invention, it has in housing, the housing motor is installed, and motor is connected with oil pump, and oil pump is connected with fuel tank, housing is provided with the control room, and oil level indicator is installed in the control room.Fuel tank be shaped as convex, the horizontal section area of fuel tank upper lobes part is less than the horizontal section area of fuel tank bottom, the bossing and the oil level indicator of fuel tank link.It indicates the flexible concrete state of squeezed arm more exactly by the situation of change of extruding and expanding machine Hydraulic Station oil level when squeezed, thereby therefore the clear and definite quality that reflects squeezed dish can satisfy the instructions for use that people understand squeezed dish quality.There is described " boiling " phenomenon equally in this Hydraulic Station.Thereby influence the operating efficiency of extruding-enlarging branch tray machine.
Summary of the invention
The purpose of this invention is to provide a kind of compacted bearing disk machine hydraulic unit that can effectively reduce hydraulic fluid temperature.
The object of the present invention is achieved like this, a kind of compacted bearing disk machine hydraulic unit, comprise: fuel tank, take into account reversal valve by electric motor driven oil pump, liquid level, wherein said Hydraulic Station spatially is separated into first and second portion at least by dividing plate, and described fuel tank is set in the described first; Describedly be installed in the described second portion by electric motor driven oil pump;
Hydraulic Station of the present invention also comprises: being installed in being used in described first or the second portion cools off the forced air cooler of hydraulic oil, and described forced air cooler is serially connected in the Hydraulic Station oil piping system by its oil-in and oil-out;
The above-mentioned parts of compacted bearing disk machine hydraulic unit of the present invention are following annexation:
The described fuel tank of content gauge UNICOM is used to indicate the flexible state of squeezed arm of extruding-enlarging branch tray machine;
The import of described oil pump is via the described fuel tank of pipeline UNICOM, and its outlet is used for providing the hydraulic oil with enough pressure to extruding-enlarging branch tray machine via the oil-in of pipeline road connection reversal valve; And
The oil return opening of described reversal valve is via the described fuel tank of return line UNICOM, so that the hydraulic oil of extruding-enlarging branch tray machine loopback is turned back in the fuel tank.
A kind of compacted bearing disk machine hydraulic unit is characterized in that described Hydraulic Station spatially is separated at least two parts by dividing plate,
In the first of being separated, be provided with fuel tank;
In the second portion of being separated, be equipped with:
By electric motor driven oil pump;
Be serially connected in the forced air cooler in the Hydraulic Station oil piping system.
In compacted bearing disk machine hydraulic unit of the present invention, described first is positioned at the top of Hydraulic Station and the bottom that described second portion is positioned at Hydraulic Station; Perhaps described first is positioned at the bottom of Hydraulic Station and the top that described second portion is positioned at Hydraulic Station.
Wherein, described first is divided into fuel tank part and control room part by dividing plate; Perhaps described first is divided into fuel tank part, control room part and storage tank part by dividing plate.
Wherein, in the part of described control room, reversal valve is installed, is used to control the flow direction of the hydraulic oil that flows into extruding-enlarging branch tray machine.
Wherein, described forced air cooler is serially connected among the return line in the described Hydraulic Station oil piping system.
Wherein, between the pipeline road of described Hydraulic Station oil piping system and return line, be connected overflow valve, be used to guarantee that system pressure is constant or limit its maximum pressure.
In compacted bearing disk machine hydraulic unit of the present invention, described forced air cooler comprises:
Bearing;
Be fixed on the radiator on the bearing, described radiator has oil-in and oil-out; And
Be fixed on the exhaust fan on the bearing, described exhaust fan is in the face of radiator.
Wherein, described radiator is made of a cooling tube or the many cooling tubes that are connected in parallel.
Wherein, at the axial groove of described cooling tube inner wall even distribution, so that increase the area of dissipation of cooling tube.
Wherein, the pipe outer wall of described cooling tube is fixed a plurality of fin, and in the pipe of cooling tube the flow-disturbing silk is installed, so that improve radiating efficiency.
The present invention fast and effeciently reduces the temperature of hydraulic oil by in the pipe-line system of Hydraulic Station forced air cooler being set, thereby can improve the operating efficiency of extruding-enlarging branch tray machine.
The present invention is described in detail below in conjunction with accompanying drawing.
Description of drawings
Fig. 1 is the schematic diagram of compacted bearing disk machine hydraulic unit master TV structure of the present invention;
Fig. 2 is the schematic diagram of the right sorrowful TV structure of compacted bearing disk machine hydraulic unit of the present invention;
Fig. 3 is the schematic diagram of compacted bearing disk machine hydraulic unit plan structure of the present invention;
Fig. 4 is a compacted bearing disk machine hydraulic unit hydraulic schematic diagram of the present invention;
Fig. 5 is the schematic diagram of the forced air cooler of compacted bearing disk machine hydraulic unit of the present invention;
Fig. 6 is the schematic diagram of first embodiment of the radiator of forced air cooler of the present invention;
Fig. 7 is the schematic diagram of second embodiment of the radiator of forced air cooler of the present invention.
Description of reference numerals: 1-liquid level liquid thermometer; The 2-fuel tank; The 3-air filter; 4-oil suction oil filter; The 5-fuel outlet valve; The 6-oil pump; The 7-motor; 8-oil return oil filter; The 9-overflow valve, the standby overflow valve of 9`-; The 10-reversal valve; 11-pressure meter switch valve; The 12-pressure meter; The 13-extruding-enlarging branch tray machine; The 14-forced air cooler; The 15-storage tank; The 16-fuel tank cap; The 17-exhaust fan; The 18-bearing; The 19-radiator; The 20-oil-out; The 21-oil-in; The 191-cooling tube; The 192-groove; The 193-cold end plate; The 194-fluting; The 195-lining; 196-flow-disturbing silk; The 197-support bar; The 198-fin; The a1-pipeline road; The a2-flowline.
The specific embodiment
At first formation of the present invention is described with reference to Fig. 1-Fig. 7.
Compacted bearing disk machine hydraulic unit of the present invention comprises: fuel tank 2, the oil pump 6, content gauge 1 and the reversal valve 10 that are driven by motor 7, wherein said Hydraulic Station spatially is separated into first and second portion at least by dividing plate, and described fuel tank 2 is set in the described first; The described oil pump 6 that is driven by motor 7 is installed in the described second portion.
Hydraulic Station of the present invention also comprises: being installed in being used in described first or the second portion cools off the forced air cooler 14 of hydraulic oil, and described forced air cooler 14 is serially connected in the Hydraulic Station oil piping system by its oil-in 21 and oil-out 20.
The above-mentioned parts of compacted bearing disk machine hydraulic unit of the present invention are following annexation:
The described fuel tank 2 of content gauge 1 UNICOM is used to indicate the flexible state of squeezed arm of extruding-enlarging branch tray machine;
The import of described oil pump 6 is via the described fuel tank 2 of pipeline UNICOM, and its outlet is used for providing the hydraulic oil with enough pressure to extruding-enlarging branch tray machine via the oil-in that pipeline road a1 connects reversal valve 10; And
The oil return opening of described reversal valve 10 is via the described fuel tank 2 of return line a2 UNICOM, so that the hydraulic oil of extruding-enlarging branch tray machine loopback is turned back in the fuel tank 2.
In compacted bearing disk machine hydraulic unit of the present invention, described first is positioned at the top of Hydraulic Station and the bottom that described second portion is positioned at Hydraulic Station; Perhaps described first is positioned at the bottom of Hydraulic Station and the top that described second portion is positioned at Hydraulic Station.
Wherein, described first is divided into fuel tank part 2 and control room part by dividing plate; Perhaps described first is divided into fuel tank part 2, control room part and storage tank part 15 by dividing plate.
Wherein, in the part of described control room, reversal valve 10 is installed, is used to control the flow direction of the hydraulic oil that flows into extruding-enlarging branch tray machine.
Wherein, described forced air cooler 14 is serially connected among the return line a2 in the described Hydraulic Station oil piping system.
Wherein, between the pipeline road a1 of described Hydraulic Station oil piping system and return line a2, be connected with overflow valve 9,9`, be used to guarantee that system pressure is constant or limit its maximum pressure.
In compacted bearing disk machine hydraulic unit of the present invention, described forced air cooler 14 comprises:
Bearing 18;
Be fixed on the radiator 19 on the bearing 18, described radiator 18 has oil-in 21 and oil-out 20; And
Be fixed on the exhaust fan 17 on the bearing, described exhaust fan 17 is in the face of radiator 19.
Wherein, described radiator 19 is made of a cooling tube 191 or the many cooling tubes that are connected in parallel 191.
Wherein, at the axial groove 192 of described cooling tube 191 inner wall even distributions, so that increase the area of dissipation of cooling tube 191.
Wherein, the pipe outer wall of described cooling tube 191 is fixed a plurality of fin 198, and in the pipe of cooling tube flow-disturbing silk 196 is installed, so that improve radiating efficiency.
Below in conjunction with accompanying drawing structure of the present invention and principle are described in detail.
Fig. 1 to Fig. 3 has shown the mechanism of compacted bearing disk machine hydraulic unit of the present invention.At first referring to Fig. 1-Fig. 3, Hydraulic Station of the present invention mainly comprises: the fuel tank 2 of placing hydraulic oil; Be arranged on the liquid level liquid thermometer 1 in the outside of fuel tank 2; Oil pump 6 and the motor (Fig. 1 does not mark) 7 that drives oil pump 6; Control hydraulic oil flows into the inflow of extruding-enlarging branch tray machine and flows out the reversal valve 10 of direction; Overflow valve 9 and standby overflow valve 9`; Filtration enters the air filter 3 of fuel tank gas; Oil suction oil filter 4; Oil return oil filter 8; Storage tank 15; And forced air cooler 14.As shown in figures 1 and 3, Hydraulic Station is divided into the upper and lower with dividing plate, and oil pump 6 that is combined as a whole and motor 7 and forced air cooler 14 are installed in the bottom of Hydraulic Station; Fuel tank 2, the control room that holds overflow valve 9,9` and reversal valve 10 and storage tank 15 are positioned at the top of Hydraulic Station, and wherein fuel tank 2, storage tank 15 and control room are separated into three spaces by dividing plate again.The main body of oil suction oil filter 4 and oil return oil filter 8 places in the fuel tank.As shown in Figure 2, the fuel tank cap 16 of fuel tank 2 and air filter 3 are arranged on the top of Hydraulic Station.
The annexation of above-mentioned parts as shown in Figure 4.Liquid level liquid thermometer 1 and fuel tank 2 UNICOMs are used to detect and indicate the liquid level and the temperature of hydraulic oil; Fuel outlet valve 5 UNICOM's fuel tanks 2 are used for draining the oil as required.Air filter 3 be arranged on the fuel tank 2 and with its UNICOM, be used for filtering and enter airborne impurity in the fuel tank.Oil pump 6 connects oil suction oil filter 4 by oil pipe, and its outlet is used for the hydraulic oil in the fuel tank 2 is pumped into reversal valve 10 via the inlet that pipeline road a2 connects reversal valve 10; The outlet of reversal valve 10 makes the hydraulic oil via reversal valve 10 flow into forced air cooler 14 coolings by return line a2 by the oil-in 21 (referring to Fig. 5) that return line a2 connects forced air cooler 14; The oil-out 20 (referring to Fig. 5) of forced air cooler 14 connects oil return oil filter 8 via oil pipe, and the hydraulic oil flow after the filtration is got back in the fuel tank 2.Pressure meter 12 connects pipeline road a1 by pressure meter switch valve 11, is used to indicate oil pressure; Main overflow valve 9 and standby overflow valve 9` are parallel to be connected between pipeline road a1 and the return line a2.Main overflow valve 9 and standby overflow valve 9` are pilot-type relief valves; its other outlet that is connected on oil pump 6; to guarantee that system pressure is constant or limit its maximum pressure, provide the safeguard protection effect to it, the constant pressure of the safety of protection oil pump 6 and oil piping system and maintenance oil piping system.Need to prove that pipeline road a1 described here is meant that generally oil pump 6 is exported to the pipeline of reversal valve 10; Described return line a2 is meant that generally reversal valve 10 is exported to the pipeline of fuel tank 2; But if Hydraulic Station is provided with oil return oil filter 8, then return line a2 is meant and refers to that reversal valve 10 is exported to the pipeline of oil return oil filter 8.
When reversal valve 10 places primary importance, reversal valve 10 is sent into outside extruding-enlarging branch tray machine 13 with the hydraulic oil of pipeline road a1 input via first pipeline (being arranged in the figure left side), and receives the hydraulic oil that extruding-enlarging branch tray machine 13 refluxes via second pipeline (being arranged in figure the right).When reversal valve 10 places the second place, reversal valve 10 is sent into outside extruding-enlarging branch tray machine 13 with the hydraulic oil of pipeline road a1 input via second pipeline (being arranged in figure the right), and receives the hydraulic oil that extruding-enlarging branch tray machine 13 refluxes via first pipeline (being arranged in the figure left side).The hydraulic oil that refluxes flows into return line a2 via the oil-out of reversal valve 10.
Oil return oil filter 8 also has an alarm and the valve according to the conducting of oil pressure pressure except having oil filter.
Owing to during the squeezed pile of extruding-enlarging branch tray machine 13, will produce a large amount of heating power, make hydraulic fluid temperature rise very highly, when the oil temperature is high to a certain degree the time, extruding-enlarging branch tray machine 13 can not be worked.Feature of the present invention is, forced air cooler 14 is set in the oil piping system of Hydraulic Station, force hydraulic oil to cool off fast by high wind through tubing system, thereby Hydraulic Station of the present invention can continue to provide to extruding-enlarging branch tray machine 13 hydraulic oil of normal temperature, thereby can improve the operating efficiency of extruding-enlarging branch tray machine 12 greatly.
Fig. 5 has shown the basic structure of forced air cooler of the present invention, and the forced air cooler 14 that the present invention adopts is arranged on the oil pipe of hydraulic system of Hydraulic Station, for example is serially connected among the return line a2 shown in Figure 4.Forced air cooler 14 comprises bearing 18, exhaust fan 17, radiator 19 and oil-in 21 and oil-out 20.Wherein, oil-in 21 connects the return line a2 (referring to Fig. 4) of Hydraulic Station; Oil-out 20 connects oil return oil filter 8 by oil pipe; Exhaust fan 17 and radiator 19 for example are separately fixed on the bearing 18 by screw; Exhaust fan 17 is in the face of radiator 19.When stream of hot oil during through radiator 19, radiator 19 is crossed in the wind of exhaust fan 17, and the heat of spreader surface is taken in the surrounding environment by the high wind of exhaust fan 17, thereby reduces the oil temperature, and cooled hydraulic oil directly or by oil return oil filter 8 flows back to fuel tank 2.
Fig. 6 has shown first embodiment of the radiator 19 that the present invention can use.In this embodiment, radiator 19 is a cooling tube 191, and at the inner wall even distribution groove 192 of cooling tube 191, these grooves 192 are provided with along the cooling tube axial direction.Groove 192 is set improves cooling effectiveness.In general, groove is set can increase by 20%～45% by area of dissipation, thereby has improved the cooling effect of cooling tube greatly.
Fig. 7 has shown second embodiment of the radiator 19 that the present invention can use.In this embodiment, a plurality of fin 198 can be set outside the pipe of cooling tube 191, flow-disturbing silk 196 is installed in pipe.Flow-disturbing silk 196 is shape in the shape of a spiral, and its kink contacts with cooling tube 191 inwalls.The flow-disturbing silk 196 that is arranged in the cooling tube 191 has stirring action, can make the lower oil of higher deep fat of cooling tube 191 central temperatures and tube wall temperature carry out sufficient heat exchange, thereby can further improve cooling effectiveness.
For the ease of installing and using, can utilize support bar 197 that flow-disturbing silk 196 is installed.As shown in Figure 7, spiral flow-disturbing silk 196 is fixed on the support bar 197 with the contact point welding of support bar 197.During use, the flow-disturbing silk 196 that will be fixed on the support bar 197 inserts along cooling tube 191 inwalls.
As selection, also can save support bar 197, and flow-disturbing silk 196 is directly installed in cooling tube 191 pipes, make its kink directly contact the tube wall of cooling tube 191.
Although the embodiment shown in conjunction with the accompanying drawings has been described in detail the present invention, should be understood that above-mentioned explanation only is used for task of explanation, rather than be used to limit the scope of the invention, so protection scope of the present invention is defined by the following claims.
Claims (10)
1. compacted bearing disk machine hydraulic unit, the oil pump (6), content gauge (1) and the reversal valve (10) that comprise fuel tank (2), drive by motor (7).
2. compacted bearing disk machine hydraulic unit, the oil pump (6), content gauge (1) and the reversal valve (10) that comprise fuel tank (2), drive by motor (7), wherein said Hydraulic Station spatially is separated into first and second portion at least by dividing plate, and described fuel tank (2) is set in the described first; The described oil pump (6) that is driven by motor (7) is installed in the described second portion;
It is characterized in that also comprising:
Being installed in being used in described first or the second portion cools off the forced air cooler (14) of hydraulic oil, and described forced air cooler (14) is serially connected in the Hydraulic Station oil piping system by its oil-in (21) and oil-out (20);
Wherein, the described fuel tank of described content gauge (1) UNICOM (2); The import of described oil pump (6) is via the described fuel tank of pipeline UNICOM (2), and its outlet connects the oil-in of reversal valve (10) via pipeline road (a1); And the oil return opening of described reversal valve (10) is via the described fuel tank of return line (a2) UNICOM (2).
3. according to the described compacted bearing disk machine hydraulic unit of above-mentioned each claim, it is characterized in that,
Described first is positioned at the top of Hydraulic Station and the bottom that described second portion is positioned at Hydraulic Station; Perhaps
Described first is positioned at the bottom of Hydraulic Station and the top that described second portion is positioned at Hydraulic Station.
4. according to the described compacted bearing disk machine hydraulic unit of above-mentioned each claim, it is characterized in that,
Described first is divided into fuel tank (2) part and control room part by dividing plate; Perhaps
Described first by dividing plate be divided into fuel tank (2) partly, control room part and storage tank (15) part.
5. according to the described compacted bearing disk machine hydraulic unit of above-mentioned each claim, it is characterized in that, reversal valve (10) is installed in the part of described control room.
6. according to the described compacted bearing disk machine hydraulic unit of above-mentioned each claim, it is characterized in that described forced air cooler (14) is serially connected in the return line (a2) in the described Hydraulic Station oil piping system.
7. according to the described compacted bearing disk machine hydraulic unit of above-mentioned each claim, it is characterized in that, between the pipeline road (a1) of described Hydraulic Station oil piping system and return line (a2), be connected overflow valve (9).
8. according to the described compacted bearing disk machine hydraulic unit of above-mentioned each claim, it is characterized in that described forced air cooler (14) comprising:
Bearing (18);
Be fixed on the radiator (19) on the bearing (18), described radiator (19) has oil-in (21) and oil-out (20); And
Be fixed on the exhaust fan (17) on the bearing (18), described exhaust fan (17) is in the face of radiator (19);
Wherein, described radiator (19) is made of a cooling tube (191) or the many cooling tubes that are connected in parallel (191).
9. according to the described compacted bearing disk machine hydraulic unit of above-mentioned each claim, it is characterized in that, at the axial groove (192) of described cooling tube (191) inner wall even distribution.
10. according to the described compacted bearing disk machine hydraulic unit of above-mentioned each claim, it is characterized in that the pipe outer wall of described cooling tube (191) is fixed a plurality of fin (198), and in the pipe of cooling tube (191), flow-disturbing silk (196) is installed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101196391A CN101130978A (en) | 2007-07-27 | 2007-07-27 | Compacted bearing disk machine hydraulic unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101196391A CN101130978A (en) | 2007-07-27 | 2007-07-27 | Compacted bearing disk machine hydraulic unit |
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| Publication Number | Publication Date |
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| CN101130978A true CN101130978A (en) | 2008-02-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007101196391A Pending CN101130978A (en) | 2007-07-27 | 2007-07-27 | Compacted bearing disk machine hydraulic unit |
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| CN (1) | CN101130978A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102011769A (en) * | 2010-12-10 | 2011-04-13 | 徐州重型机械有限公司 | Wheeled crane and hydraulic oil cooling system and control method thereof |
| CN102179513A (en) * | 2011-03-30 | 2011-09-14 | 成都四星液压制造有限公司 | Variable control device of hydraulic system for magnetic material automatic wet pressing machine |
| CN102852910A (en) * | 2012-10-11 | 2013-01-02 | 四川省四通车辆制造有限公司 | Hydraulic cooling loop system |
| CN104763483A (en) * | 2015-04-23 | 2015-07-08 | 新兴铸管股份有限公司 | Lubricating oil station system for draught fan or turboset |
| CN108597763A (en) * | 2018-04-19 | 2018-09-28 | 保定多田冷却设备有限公司 | Transformer forced oil-circulation cooling tube mixing arrangement type forced air cooler |
| CN112833064A (en) * | 2020-12-30 | 2021-05-25 | 王雪峰 | Intelligent hydraulic station for numerical control machine tool |
-
2007
- 2007-07-27 CN CNA2007101196391A patent/CN101130978A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102011769A (en) * | 2010-12-10 | 2011-04-13 | 徐州重型机械有限公司 | Wheeled crane and hydraulic oil cooling system and control method thereof |
| CN102011769B (en) * | 2010-12-10 | 2014-12-10 | 徐州重型机械有限公司 | Wheeled crane and hydraulic oil cooling system and control method thereof |
| CN102179513A (en) * | 2011-03-30 | 2011-09-14 | 成都四星液压制造有限公司 | Variable control device of hydraulic system for magnetic material automatic wet pressing machine |
| CN102852910A (en) * | 2012-10-11 | 2013-01-02 | 四川省四通车辆制造有限公司 | Hydraulic cooling loop system |
| CN104763483A (en) * | 2015-04-23 | 2015-07-08 | 新兴铸管股份有限公司 | Lubricating oil station system for draught fan or turboset |
| CN108597763A (en) * | 2018-04-19 | 2018-09-28 | 保定多田冷却设备有限公司 | Transformer forced oil-circulation cooling tube mixing arrangement type forced air cooler |
| CN112833064A (en) * | 2020-12-30 | 2021-05-25 | 王雪峰 | Intelligent hydraulic station for numerical control machine tool |
| CN112833064B (en) * | 2020-12-30 | 2022-08-30 | 广州白云液压机械厂有限公司 | Intelligent hydraulic station for numerical control machine tool |
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Open date: 20080227 |